No
REPLACE the fuse(s). CLEAR the DTCs. TEST the system for normal operation. If the fuse(s)
fail again, CHECK for a short to ground. REPAIR as necessary.
A3 CHECK CIRCUIT 1052 (T/BK) FOR VOLTAGE
Fuse Junction Panel C243
Measure the voltage between fuse junction panel C243-11, circuit 1052 (T/BK), and ground.
Is the voltage greater than 10 volts?
Yes
REPLACE the fuse junction panel. CLEAR the DTCs. TEST the system for normal operation.
No
REPAIR circuit 1052 (T/BK). CLEAR the DTCs. TEST the system for normal operation.
A4 CHECK THE IGNITION STATES — MONITOR THE GEM PID IGN_GEM
NGS
NOTE: If the vehicle is equipped with a manual transmission, depress the clutch pedal while
turning the ignition switch to the START position.
Monitor the GEM PID IGN_GEM and rotate the ignition switch (11572) through the START,
RUN, OFF, and ACC positions.
Do the PID values agree with the ignition switch positions?
Yes
GO to A5.
No
REPAIR the ignition circuit(s) (RUN/ACC: circuit 297 [BK/LG], RUN: circuit 1040 [R/LB],
START: circuit 32 [R/LB] or circuit 481 [GY/Y]) in question. CLEAR the DTCs. TEST the
system for normal operation.
A5 RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCS)
Retrieve and Document Continuous DTCs
Clear Continuous DTCs
GEM On-Demand Self-Test
Are any DTCs recorded?
Page 7 of 741998 F-150/250 Workshop Manual
1/11/2011http://www.fordtechservice.dealerconnection.com/pubs/con...
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